Derivatives

trepanation

Advocates of the bizarre procedure say trepanation improves blood flow around the brain and gives it an expansion window to adjust naturally to gravity, air pressure, headaches, and assorted mental strains.

It has a 45 mm by 30 mm hole in the top made by a gruesome procedure known as trepanation, where a portion of the bone was removed from a living and most likely conscious patient.

The ancient practice of trepanation involves drilling a hole into the skull of a living human being to relieve illness or release evil spirits.